DOWNFALL: Amanda Bynes in a 2012 LA mug shot, and last night in a wig (above) being walked from the Midtown North station house.Christopher Sadowski

Pittsburgh Skyline

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Maybe Anthony Weiner should just stay off the Internet.

The peter-tweeting pol marked his first official day of mayoral campaigning with another ’Net blunder — using an image of the Pittsburgh skyline, instead of New York City’s, on his official Web page.

The image depicted a view of the Steel City and its distinctive, eight-sided BNY Mellon Center from the Roberto Clemente Bridge. Weiner’s Mets-inspired orange and blue “Weiner for Mayor” logo was superimposed over the photo.

The born-and-bred New York candidate left it to the Web site’s designers to explain the screw-up, with a fumbling apology that dissed Pittsburgh in the process.

“The offending image has been replaced,” said John Brougher, marketing vice president for tech firm NGP VAN.

“This is our fault,” the exec wrote in an e-mail. “The image of the wrong skyline … was our honest mistake, and not that of the Weiner campaign.”

He said a designer took the Pittsburgh image from a set that included New York City shots, “but obviously, this image was not of New York City, as the Weiner campaign had requested.”

The Pittsburgh image was later replaced with a montage of New York photo images.

NGP VAN bills itself as “the nation’s leading technology provider to Obama for America and thousands of Democratic campaigns.”